When the twin goddesses's souls and bodies were split into 2 they created 7 grand summons.  There was the commune six, shiva the mistress of ice, raja the mistress of storms, koto koto the creature of the sea, blaze the master of fire, gale the mistress of wind, and Titania the magical girl of the earth.  There was one grand summon who was too powerful to be summoned unless all 6 of the others were present in one location, this one was known as bahamaut the master of bloom.  Bloom was a mysterious sort of mana that ran through the people who the grand summons were attached to and could be activated once that person confronted their greatest foe.  The power of bloom has been used by some of the most powerful magicians throughout history, Joan of Arc used her bloom of earth to fight the British, cleopatra used the bloom of water to bring rain to her country, and Julius Caesar used the bloom of wind to make his armies undefeated.